Adjustable pipe-tongs



(No Model.)

L. GOES.

ADJUSTABLE PIPE ToNGs.

No. 366,379. Patented July 12, 1887.

MFM/:79555 w UNITED STATES ATENT Fries...

LORING GOES, OF VORCESTER, MASSACHUSETTS.

ADJUSTABLE PIPE-TONGS.

SPECIFICATION forming part of Letters Patent No. 366,379l dated July l2, 1887.

Application tilcd'Fcbrnary 5, 1886. Serial No. 100,597. (Nn model.)

To m36 whom, it may concern:

Be it known that I, LORING Cons, a citizen of the United States, residing at \Vorcester, in the county of Vorcester and State of Massachusetts, have invented certain new and use ful Improvements in Adjustable Pipe-Tongs, of which the following, together with the accompanying drawings, is a specification sufficiently full, clear, and exact to enable persons skilled in the art to which this invention appertains to make and use the same.

This invention relates to that class of pipetongs which are capable of being adjusted to move the jaws more or less apart or away from each other, so that they may be made to grasp pipes of varying diameters, the object being to improve the construction, so as to render the tongs more practical for manufacture and more desirable and perfect for use.

To this end myinvention consists in certain details of construction, as hereinafter fully described, and particularly pointed out in the claim.

In the drawings, Figure l is a side view of a pair of pipe-tongs embodying my invention; Fig. 2, a longitudinal section on line w w of Fig. l, Fig. 3, a transverse section on lineoy thereof; Fig. 4, a similar section on line g/ y; Fig. 5, a side View of one of the fulcruurboltcarrier links.

In reference to parts, A denotes the main lever, which is provided with a hook-jaw, a, the inner part of which is provided with two approximately straight convergingsurfaces at b b, which act as bearing-surfaces for the pipe which is to be grasped. by the tongs. The main lever is further provided with an opening or eye, C, which receives the secondary or gripping lever D, the latter being provided with a fulcrum-bolt, F, in that part which enters the eye of the main lever A, the said bolt projecting from either side of the gripping lever and extending at either side, so as to project outward through the slotsff inthe sides of the main lever A.

The fulcrum-bolt F is fitted closely in the gripping-lever D, but can move back and forth in the slots ff, to permit the. gripping-lever to be moved in the eye C, in the manner to be presently set forth. r[he gripping-lever D has a chisel end, d, for gripping, to be placed between the jaws.

The main lever is furnished with ascrewthread, E, and provided with an adjustable stop consisting of a threaded nut or sleeve, H, fitted on said screw-threaded portion, and rotatable for effecting its adjustment. Intermediate of said stop-nut and the fulcrum-bolt,and secured to the latter, is a fulcrum-bolt carrier adapted to be operated by movement of the nut on the threaded shank, so as to change the relative position of the main and secondary levers to adjust their jaws for grasping pipes of different diameters.

The fulcrum -bolt carrier consists of two metal straps or links, I, arranged at each side of the main lever near its slotsff, connected to the ends of the fulcrum-bolt F, and working in conjunction with the nut H in such manner that when the nut is rotated on the threaded shank the fulcrum-bolt carrier moves in response to the action of the screw-threads and forces thc fulcrum-bolt along the slots f, thus adjusting the jaw d of the gripping-lever D toward or from the jaw a of the main levcr,so that said jaws will accommodate a larger Aor smaller pipe.

The connection of the link or fulcrum-bolt carrier I with the stop-nut H is effected by means of a lug, 1', which enters an annular groove, Il, formed in the nut H. The lugst' are locked into the groove 7L before the nut is placed upon the main lever, and are then re. tained in position after the parts are in place by the links resting against the flattened sides of said main lever, as shown. rIhe opposite ends of said links are fitted over the ends of the` fulcrum-bolt F, a suitable hole, Z, being provided, and are retained thereon by the heads m or nuts m of said bolt( If desired, the links of the fulcrum-bolt carrier can be connected with each other adjacent to thecnd that works in conjunction with the stop or nut H, the links being coupled or retained in place by a collar or connection that encirclcs the shank of the main lever.

By constructing and arranging the mechanism in the manner shown, with the gripping lever passing through an eye in the main lever and the fulcrum-bolt and links disposed as described, I produce a very neat,compact,strong, and desirable instrument, one that can be manufactured with practical facility and at reasonable expense, and which can be conveniently IOO lI am also aware that Letters Patent-have 'heretofore been granted for pipe-tongs in which adjustment is effected by moving the fulcrum-pin by a nut upon thefshank of the main bar. The construction, form, and disposition of the parts are, however, different from my improved tongs, and I do not include such within the scope of my claim.

What I claim as of my invention, and desire to secure by Letters Patent, is-

Pipe-'tongs constructed as hereinbcfore described, consisting of a main lever screwthreaded onits shank, and provided with a hookedjaw, a, an eye, C, and-a pair ofslots,ff, opening laterally into said eye, -a grippingdever, curved as shown, and passing through said eye, a fulcrum-bolt tted at its center in said gripping-lever, With its ends extending laterally at either side through therespeetive slots of the main lever, a nut rotatable on the threaded shank of said main lever, and the fulcrum-bolt carriers attached to the ends of the fulcrumbolt and extending along the sides of the main lever to said nut, with the rear end Working in conjunction therewith, all constructed and combined foi1 operation as herein shown and described.

Witness my hand this 3d day of February,

LORlNG GOES.

Witnesses:

OHAs. H. BURLEIGH, ROBERT A.- MORGAN, 

